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How do implicit casts differ from explicit casts in JavaScript?

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2023-09-03 15:29:021387browse

JavaScript 中的隐式强制转换与显式强制转换有何不同?

In this article, you will learn how implicit casts differ from explicit casts in JavaScript.

Implicit cast is the automatic conversion of a value from one data type to another. It is also called type conversion.

Explicit coercion is to convert the data type according to the user's needs.

Example 1

In this example, let us understand implicit casts.

let inputValue = "5"
console.log("The input variable is defined as: ")
console.log(inputValue, typeof inputValue);
let resultValue = Number(inputValue);
console.log("The input variable is defined as: ")
console.log(resultValue, typeof resultValue);

illustrate

  • Step 1 - Define a variable: inputValue and assign an integer.

  • Step 2 - Add an empty string to "inputValue". The type of 'inputValue' is now changed from number to string.

  • Step 3 - Display the values ​​and their types as results.

Example 2

In this example, let us understand explicit cast.

let inputValue = "5"
console.log("The input value is defined as a string with value: ", inputValue)
let resultValue = Number(inputValue);
console.log("The result value after conversion to a number is :", resultValue)

illustrate

  • Step 1 - Define a variable: inputValue and assign it a string value.

  • Step 2 - Convert string value type to integer. Now the type of 'inputValue' is changed from string to number.

  • Step 3 - Display the values ​​and their types as results.

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